chore(deps): update dependency @api3/contracts to ^31.4.0

Author: renovate[bot]

package.json

@@ -18,7 +18,7 @@
     "firebase:emulator": "pnpm docs:build; firebase emulators:start"
   },
   "devDependencies": {
-    "@api3/contracts": "^31.2.0",
+    "@api3/contracts": "^31.4.0",
     "@api3/dapi-management": "^3.69.0",
     "@types/node": "^24.9.2",
     "axios": "^1.13.1",